Air Conditioning Quit
Posting Guru
Joined: Sep 2001
Posts: 1,539
Likes: 3
Originally Posted by igotoneforya
Right, orfice tube-is that near the muffler belt?
Posting Guru
Joined: Sep 2001
Posts: 1,539
Likes: 3
Originally Posted by Big Sky
So if I take the clutch cycle switch out, the freon should stay put correct?
Elder User
Joined: Nov 2005
Posts: 726
Likes: 1
Big Sky ... yes there is a schrader valve behind the switch. The orfice tube works just like an expansion valve it converts the high pressure low temp side of the condenser to a low pressure gas. It's located in the liquid line running on the passenger side of the truck. Follow the aluminum line from the condenser towards the evaporator they'll be a fitting that joins two pieces of line together it'll be in there.
Posting Guru
Joined: Jul 2006
Posts: 1,720
Likes: 1
[QUOTE=igotoneforya]Right, orfice tube-is that near the muffler belt?
QUOTE]
Telling the shop you know what's wrong does 2 things:
But it could be the twiddle nut located next to the kiniblin pin.
Jim
QUOTE]
Telling the shop you know what's wrong does 2 things:
- Lets them fix exactly what you tell them
- Gives them an excuse when it doesn't work, "we fixed what you told us"
But it could be the twiddle nut located next to the kiniblin pin.
Jim
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
Originally Posted by 1
Actually, there really is an orifice tube and its a screen designed to catch anything floating aorund the system from say a compressor that may be slowly going out. Im no A/C expert but thats about what i know about it. It is real.
The fact that it catches any dirt/crud/particles floating around, was NOT a design feature, it's just a fact of life
If you change the pressure switch and the AC still doesn't work, try this: With the engine running and AC on, CAREFULLY tap the front of the AC clutch with a screwdriver, hammer handle, anything - BE CAREFUL not to get it caught in the belt.
If the compressor engages when you tap on the front of the clutch, the air gap on the clutch has to be adjusted down. Sometimes, the gap in the clutch is too high and it won't engage. Thing is, most AC places will replace the entire compressor instead of playing around. You can do it yourself. Remove the clutch and there's a shim under it to adjust the air-gap. A thinner shim will cure the problem. If it's the air gap.
Elder User
Joined: Apr 2004
Posts: 782
Likes: 0
From: Sweet Home Alabama
Sorry I hijacked this thread sort of...
Is the 'tap on te AC clutch' a trick for me or big sky?
So basically, I should replace an expansion valve in both the front and rear of the X, one of them is the orfice tube and the other one is just a valve? Where is the rear one located? In the storage area on passenger side I'd guess.
Seriously, thanks for all the help with AC system, even if you make up the names for some parts...
Is the 'tap on te AC clutch' a trick for me or big sky?
So basically, I should replace an expansion valve in both the front and rear of the X, one of them is the orfice tube and the other one is just a valve? Where is the rear one located? In the storage area on passenger side I'd guess.
Seriously, thanks for all the help with AC system, even if you make up the names for some parts...
Posting Guru
Joined: Jul 2006
Posts: 1,720
Likes: 1
I would use gauges on the high side/low side and then jumper the 2 wire connector to the clutch to force engagement. Then read the gauges. The low should be 28-32 and the high from 240-300 given temp differences and pressure altitude. This would be the correct way. Given you might not have gauges, you could just put a jumper wire across the clutch wiring and start the engine to see if the clutch engages. If it does not you might have a clutch issue. If it does you are probably low on freon from a leak somewhere. Hope this helps. Jim
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Laughing Gas
Joined: Sep 2003
Posts: 852
Likes: 12
From: Billings, MT
Well. I finally got around to replacing the pressure cycle switch and no luck. I also tried the tapping the clutch deal and nor luck there either. Shot some WD-40 in case it was stuck. I've checked the connections and everything looks good there. Could it be the control panel in the dash?
Posting Guru
Joined: Jul 2006
Posts: 1,720
Likes: 1
Originally Posted by vettdvr
I would use gauges on the high side/low side and then jumper the 2 wire connector to the clutch to force engagement. Then read the gauges. The low should be 28-32 and the high from 240-300 given temp differences and pressure altitude. This would be the correct way. Given you might not have gauges, you could just put a jumper wire across the clutch wiring and start the engine to see if the clutch engages. If it does not you might have a clutch issue. If it does you are probably low on freon from a leak somewhere. Hope this helps. Jim
Thread
Thread Starter
Forum
Replies
Last Post
